"Jennifer Lawrence" became a Twitter trend after the leak hit mainstream news sites.
A list of the alleged victims has also appeared online, Buzzfeed noted. There are 101 names in total.
Some of those women include Aubrey Plaza, Candice Swanepoel, Cara Delevingne, Cat Deeley, Hillary Duff, Kaley Cuoco, Kate Upton, Kelly Brook, Kim Kardashian, Lea Michele, Michelle Keegan, Selena Gomez, Rihanna and Vanessa Hudgens.
Upton's spokesperson told HuffPost that they are looking into the allegations.
A spokesman for Ariana Grande told MailOnline photos that claim to show her are fake.
The Mirror reported that Twitter is shutting down accounts that are disseminating the pictures.
The hacker claims to have a "full set" of photographs of US soccer star Hope Solo, as well as a double photograph allegedly showing Allison Brie and Dave Franco.
Actress Mary Elizabeth Winstead, who was also listed as a victim, wrote on Twitter:
To those of you looking at photos I took with my husband years ago in the privacy of our home, hope you feel great about yourselves.
She also expressed sympathy for others, tweeting:
Knowing those photos were deleted long ago, I can only imagine the creepy effort that went into this. Feeling for everyone who got hacked.
Winstead implied she was facing difficulties on Twitter Sunday, when she tweeted:
Great day for the block button!
Nickelodeon star Victoria Justice denied the nude photos that claim to show her are real.
She tweeted:
These so called nudes of me are FAKE people. Let me nip this in the bud right now. *pun intended*
Celebrities have often been targets of phone hackers, with Christina Hendricks, Olivia Munn and Blake Lively recent victims.
In 2012 a man was sentenced to 10 years in prison for releasing nude images of Scarlett Johansson on the internet.
Seth Rogen criticized the hacker on Twitter, writing:
Posting pics hacked from someone's cell phone is really no different than selling stolen merchandise.
I obviously am not comparing women to merchandise. Just legally speaking, it shouldn't be tolerated to repost stolen pics.
- Daily Mail